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Manual 2100-422M
Page 17 of 42
• Then, to reset, hold the button down for 15
seconds until the red light turns off and the yellow
LED turns on. Observe at least one full control
sequence of operation from startup to shutdown.
Simulate a flame failure lockout by following the
procedure (within this manual). If the operation is
erratic, or not to specifications, then replace the
control. Always verify the control functions
according to all specifications before leaving the
installation site.
DISABLE FUNCTION
• Any time the burner is running, press and hold the
reset button to disable the burner. The burner will
remain off as long as the button is held.
Burner Option – Flame Quality Monitor
This control is trained to recognize and remember a
good flame based on initial burner set up. Control
then monitors the flame via the CAD cell signal for
deviation in the combustion characteristics of the
burner. If the control senses a deviation on the high
side or on the low side from the original set up
condition for three consecutive cycles, it will trigger
an alarm circuit which can be tied to an audible local
device to signal the home owner or into the home
security system. Upon being notified of the alarm,
the security agency will notify the dealer of choice
based upon information supplied by the home
owner. The system will also be capable of being
connected to a phone line that will contact the dealer
directly with the alarm. This alarm will typically
sound 3 to 5 days prior to the primary control going
into lockout giving the service agency a prior notice
before a sooting condition or other failure can occur
resulting in untold savings. This monitor system is
available through your local distributor under the
Honeywell Part #QS7100F.
• If the control locks out three times without a
satisfied call for heat, or due to other significant
events such as a relay contact weld, the Lockout
becomes restricted in order to prevent repetitious
resetting by the homeowner.
Electronic Blower Control Board (EBC)
This furnace is equipped with an Electronic Blower
Control (EBC), which controls all comfort air blower
operations. This EBC has three relays; one for
heating speed, one for cooling speed, and one which
isolates the T–T signal from the oil primary control.
NOTE: If a jumper wire is placed across “R” and
“W” prior to turning on power to the unit
and then power is applied, the comfort
air blower will start and run for the
ignition period and through the entire
call for heat.
Once this call for heat is satisfied, the
blower will function according to the
regular blower on and blower off delay
cycles.
This EBC is designed to be very simple and
dependable. This basic control allows for easy
troubleshooting and maintenance. As illustrated in
Figure 7 all connections are well marked. The
blower on and off timings for both heating and
cooling speeds are timed automatically. The heating
blower off delay can be selected from four different
timings by moving the selection jumper. The timings
are as follows:
Heating Blower ON delay – 75 seconds from a call
for heat.
Heating Blower OFF delay – Selectable in seconds:
150, 180, 210 or 240. Factory shipped at 240.
Cooling Blower ON delay – 6 seconds from a call for
cooling.
Cooling Blower OFF delay – 60 seconds.
RESETTING FROM RESTRICTED LOCKOUT
CAUTION
Before resetting the control from restricted
lockout state, troubleshoot the heating
system for the root cause(s) of lockout and
make necessary repairs or adjustment to
ensure a safe start condition.